Solar panel



FIG. 1 is a front perspective view of a solar panel showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a left elevational view thereof; and,

FIG. 5 is a right elevational view. 

CLAIM The ornamental design for a solar panel, as shown and described. 